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(No Modl.) 2 SheetsSheet 1.

M. G. BUNNELL. MACHINE FOR MAKING 0R REPAIRING ROADS.

No. 515,744, Patented Mar,.6, 1 94.

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(No Model.)

, M. G. BUNNELL. MAGHINB FOR MAKING (LB, REPAIRING ROADS.

Patented Mar. 6, 1894. kl

a W 7 j w 2/ W Q m m MW 1 UNITED STATES PATENT MORTON G. BUNNELL, OFCHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK C. AUSTIN, OF SAME PLACE.

MACHINE FOR MAKING OR REPAIRING ROADS.

SPECIFICATION forming part of Letters Patent No. 515,744, dated March 6,1894.

Application filed March 2,1891. Serial No. 383.392. (No model.)

To aZZ whom it may concern.-

Be it known that I, MORTON G. BUNNELL, acitizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Machines for Making andRepairing Roads, of which the following is a specification.

The object of my invention is to provide to novel and improved means foreffecting the horizontal swinging adjustment of the rear axle.

In the accompanying drawings; Figure 1,

illustrates, in top plan a road-working mar 5 chine embodying myinvention, but divested of various matters which while understood to bepresent, are so common and well known in the art as not to requirespecial illustration. Fig. 2, is a top plan on a large scale, of therear portion of the machine,with the ends of the rear axle broken away.Fig. 3 is a cross section on line a@ in Fig. 2, the axle being shown inelevation. Fig. 4 is a side elevation of Fig. 2.

The body-frame A is, at its forward end, pivotally supported upon thefront axle B; a preferred pivotal connection between the two being afifth wheel 13', although any other known or suitable pivotal connectioncan be employed. 7

The scraper-blade O, is arranged to extend across the space between thefront wheels 1 and rear wheels 2; and is diagonally adj ustable; that isto say, it is pivotally held be- 5 tween its ends, so that it can beswung horizontally about its longitudinal middle; and, hence, be setmore or less oblique to the line of progress. The scraper-blade can bepushed by or drawn from the body-frame; but is preferably drawn by ahorizontally-swinging and vertically-tilting draft-bar D, with which itis pivotally held at the forward end of the machine.

It is understood that, in practice, means 5 are provided for swingingand tilting the draft-bar and for adjusting the scraper-bladeindependently of the draft-bar, so as to vary the horizontal angle ordiagonal adjustment of the bladerelatively to the line of road; and alsothat means are provided for effecting the raising and lowering of theblade. Va-

rious devices have been provided for efiecting such adjustments on thepart of the draftbar and scraper-blade; hence, the same need not beherein illustrated, it being observed, however, that efficient devicesfor such purposes have been devised by me, and embodied in LettersPatent of the United States, Nos. 427,788 and 427,739.

The body-frame carries a couple of curved co racks F, arranged atopposite sides thereof; and the rear axle is provided with co -wheels orpinions G, which are fixed upon the axle and arranged to engage saidracks. The racks are arranged respectively at opposite sides of, therear axle; that is to say,one rack is arranged above and the other rackarranged below said axle. \Vhen, therefore the rear axle is rotatedabout its axis, one of its co wheels will travel toward the front whilethe other cog-wheel will travel toward the rear of the machine, and,thereby, swing the axle horizontally about a point midway of its ends.As a matter of course, a longitudinal movement on the part of the racksrespectively in opposite directions would rotate and cause a swing onthe part of the rear axle, but I prefer to arrange the racks rigid uponthe bodyframe, and rotate the rear axle by suitable means. If however,it is desired to move the racks, they could be adjustably attached tothe body-frame,'and if preferred any suitable mechanical device such asa screw orlever could be used for adjusting them.

In order to prevent the rear axle from tilt- 8 5 ing, independently ofthe body-frame; and to further guard against end thrust on the part ofsaid axle; I provide, in conjunction with each rack, a curved hearing orguide H,,which is fixed upon the body-frame and formed on go a curvecorresponding with the circle in which the end portions of the axleswing. I have provided each cog-wheel or pinion G with an annular ofisetformed at its inner end and arranged to receive one of said guides, asin Fig. 5 3. These racks F and guides H are conveniently formed alongU-shaped bars N, which are'secured to the body-frame.

As a means for rotating the rear axle, I provide it with ratchets ornotched wheels or [no disks K, fixed upon the end portion of the axle;and, in connection with each notched by operating either hand lever;although, as

a desirable mode of operation, the attendant will swing the hand levers;it being understood that, after swinging the hand levers in directionstoturn the axle, they can be brought back to their first position afterthe operator has disengaged the latches from the ratchets.

Various devices can be provided for looking the rear axle againstrotation, the looking device herein shown being a collar or hub 6, fixedupon the axle, and provided with teeth or recesses 7; and a foot latchM, supported by the platform M, and arranged for engaging said hub.

. In application, Serial No. 383,140, filed by me on February 28, 1891,I have provided a horizontally swinging rotary rear axle, but'in placeof the rack and pinion movement herein embodied, I have provided strapsand:eccentries. While the two devices involve different constructions,itwill be seen that in each case I provide a'horizontally swingingrotary:

adjustable rear axle.

What I claim as my invention is- V V 1. The combination substantially ashereinbefore set forth in a road-working machine, of a wheel supportedbody-frame, a diagonally adjustable scraper-blade arranged between thefront and rear wheels, and a horizontally swinging rotarily adjustablerear axle, for the purpose described.

2. The combination in a road-working machine provided with a diagonallyadjustable scraper-blade arranged between the front and rear wheels, ofa rotary and horizontally swinging rear axle adjustable independently ofthe body-frame, and a rack and pinion for adjusting the rear axle,substantially as set forth.

3. The combination in a road-working machine provided with a diagonallyadjustable scraper-blade arranged between the front and rear wheels, ofthe rotary and horizontally swinging rear axle, a pair of racks carriedby the body-frame and arranged respectively above and below the rearaxle and cog-wh eels or pinions on the rear axle engaging the rackssubstantially as set forth.

4:. The combination in a road working machine provided with a diagonallyadjustable scraper-blade arranged between the front and rear wheels, ofthe rotary and horizontally swinging rear axle, a pair of racks F, fixedupon the body-frame and arranged respectively above and below the rearaxle, and cogwheels or pinions on the rear axle engaging the racks;substantially as set forth.

5. The combination in a road-working ma- 7 chine provided with adiagonally adjustable scraper blade arranged between the front and rearwheels, of the rotary and horizontally swinging rear axle, a pair ofracks secured upon the body-frame and arranged'respectively. above andbelow the rear axle, and

' means suitable for rotating the rear'axle, and

the wheels carried by the rear axle for engaging with the rackssubstantially as and for the purpose set forth.

6. The combination in a road Working machine provided with a diagonallyadjustable scraper-blade arranged between the front and rear wheels ofthe rotary and horizontally swinging rear axle, a pair of racks securedupon the body-frame and arranged respectively above and below the rearaxle, cogwheels on the rear axle:engaging the racks, V V

and means for rotating the rear axle comprisinga vibratory hand leversupported upon but arranged to'swing' independently of the rear axle,ratchets or notched wheels fixed upon said axle, and latches carried bythe hand levers and engaging said ratchets, substantially as set forth.

r 7. The combinationin a road working machine provided with a diagonallyadjustable scraper-blade, of the rotary horizontally swinging rear axle,a rack F, on the bodyframe, a cog-wheel on the rearaxle engaging .beforeset forth in a machine for making and repairing roads, involving ascraper-blade arranged for diagonal Work, of a body-frame, U -bars Nsecured to the body-frame and each provided with a rack, thehorizontally swinging rotary rear axle extending from one of the saidU-shape bars to the other, and provided with cog wheels which engagewith said racks a hand lever loose upon the rear axle and provided witha latch arranged to engage a gear fixed upon the rear axle, a disk orannular shoulder 6 fixed upon the rear axle and provided with latchreceiving holes or notches, and a foot latch supported on the body-frameand arranged to engage in the holes or notches of said disk or shoulder.

MORTON G. BUN N ELL.

Witnesses:

HARRY COBB KENNEDY, CHAS. G. PAGE.

